#include <stdio.h>

int main()
{
	char line[100]; // Used for getting lines
	char grade[10]; // Used for printing grade letter
	int percent; // Used for getting precent

	printf("Please Enter A Grade Letter:\nGrade Letter: ");
	fgets(line, sizeof(line), stdin);
	sscanf(line, "%d", &percent);

	if(percent == 0 && percent <= 60){
		grade = "F";
	}
	if(percent == 61 && percent <= 63){
		grade = "D-";
	}			
	if(percent == 64 && percent <= 77){
		grade = "D";
	}
	if(percent == 68 && percent <= 70){
		grade = "D+";
	}		
	if(percent == 71 && percent <= 73){
		grade = "C-";
	}		
	if(percent == 74 && percent <= 87){
		grade = "C";
	}
	if(percent == 78 && percent <= 80){
		grade = "C+";
	}	
	if(percent == 81 && percent <= 83){
		grade = "B-";
	}	
	if(percent == 84 && percent <= 87){
		grade = "B";
	}
	if(percent == 88 && percent <= 90){
		grade = "B+";
	}
	if(percent == 91 && percent <= 93){
		grade = "A-";
	}
	if(percent == 94 && percent <= 97){
		grade = "A";
	}
	if(percent == 98 && percent <= 100){
		grade = "A+";
	}

	printf("Grade Letter is: %s\n",grade);

	return 0;
}